Good advice on the balls...yes the GI-SD is superior for most of us.
When you make it to master when going from slower meter to faster meter clubs, there is a get used to it period most of us older guys have to go thru...you will be cussing about making master for about a month while you get used to the new meter.
Which ever clubs you chose, try to make sure there all the same meter speed. IMHO this helps you learn the meter faster. Out of all the clubs available, the clubs with the highest precision will give you over all the best satisfaction.
The only change I have with that idea in mind..I have the r9. It is less precise than the g-10 master, but what fun!
This is just my opinion, your millage will vary.